Gadenin日本語Get the appLate winter: tip, tie in and feed
Start the year with the canes you kept last autumn. Shorten each one by about 6 inches (15 cm), or back to the top wire if it overshoots, cutting into firm live wood below any tip dieback. Tipping does two things: it forces the fruiting side shoots that carry the actual crop, and it stops long canes reaching the ground later and rooting.
Then tie the canes properly along the wires, spaced 4 to 6 inches (10 to 15 cm) apart, using soft string in a figure of eight. Do this before the buds break, because canes handled in leaf snap at the base. Finally, scatter a balanced fertilizer over the root area at roughly 3 ounces per square yard (100 g per square meter) and mulch 2 inches (5 cm) deep with compost, keeping the mulch 3 inches (8 cm) clear of the crown.
Spring: new canes appear, and the sides are set
New canes push up from the crown as the soil warms. This is the moment that decides how easy the rest of the year is. Decide which side of the plant the new canes are going to, take the fruiting canes to the other side, and stick to it. Once the two ages are separated on the wires, winter pruning becomes a decision made by position rather than by inspection.
Thin the new canes as they come, keeping four to six strong ones per plant and snapping the rest off at ground level while they are still soft. Flowers open on the older canes towards the end of spring or into early summer; from that point the plant needs water more than anything else.
| Season | Main job | Watch for |
|---|---|---|
| Late winter | Tip retained canes, tie in, feed and mulch | Dieback at cane tips; frost-lifted new plantings |
| Spring | Thin new canes to four to six, set the two sides | Weak crowded canes; weeds at the base of the row |
| Early summer | Water through flowering; net as fruit colors | Poor bee activity in cold wet weather at flowering |
| Midsummer | Pick every two or three days for about six weeks | Gray mold on touching berries; birds finding the row |
| Late summer | Cut fruited canes to the ground once picking ends | Cane tips arching down and rooting |
| Autumn | Tie the new canes in for winter, clear debris | Cane blight patches near soil level |
| Winter | Nothing but checking ties and support | Sagging wires; ties chafing into canes |
Summer: water, pick, and keep the tips off the ground
From flowering to the end of picking is the only period when blackberries genuinely need watering. Give an established plant 4 to 5 gallons (18 to 22 liters) a week in one or two long soakings at the base through a dry spell. Drought in this window gives crumbly, seedy fruit that never sweetens, and it cannot be corrected later.
Pick every two or three days across the six-week window, taking only berries that have gone dull matt black and release with no resistance at all. At the same time, run your eye along the outside of the plant for new canes arching down towards the soil, and tie them back up before the tips touch. One missed tip a year is how a row becomes a thicket.
Late summer and autumn: clear out and reset
As soon as the last worthwhile berry is picked, cut every cane that fruited right down to ground level with no stub, drag the canes out through the wires and take them off the plot. Doing this immediately rather than waiting for winter opens the plant up while the new canes are still ripening their wood, and it removes the diseased material that would otherwise sit in the row all winter.
Then untie the new canes and move them across to the side the fruited canes have just vacated, spacing them along the wires. That single move sets the plant up for next year and swaps the sides over ready to do the same thing in reverse. Check the posts and wires while the plant is easy to reach, and clear fallen leaves and debris from under the row.
- End of picking: cut out the fruited side Every cane that carried berries is dead wood now. Cut it at soil level, remove it from the plot and clean your pruners afterwards, particularly if you found any dark patches at the base of a cane.
- Move the new canes across Untie the four to six retained canes and fan them onto the emptied side of the wires, 4 to 6 inches (10 to 15 cm) apart. Leave the tipping until the end of winter, once the risk of tip dieback has passed.
- Close the season's record Write down the first and last picking dates, the rough weight, how many canes you kept and which side they are on. That last detail matters: after a few years of swapping sides you will not remember, and it is the fastest way to pick the plant up again next spring.
Blackberries are hardy and need no winter protection in most gardens, but wind does the damage. Check every tie in late autumn: a cane that works loose in a gale whips against its neighbors and wounds the bark, and wounds near the base are exactly where cane blight gets in.